linux-kernel - Re: [PATCH 2/2] hwmon: ina3221: Get channel names from DT node

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Date:   Fri, 21 Sep 2018 10:43:54 -0700
From:   Nicolin Chen <nicoleotsuka@...il.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     jdelvare@...e.com, robh+dt@...nel.org, mark.rutland@....com,
        afd@...com, linux-hwmon@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] hwmon: ina3221: Get channel names from DT node

On Fri, Sep 21, 2018 at 05:56:00AM -0700, Guenter Roeck wrote:

> > I tried is_visible but it looks like it won't be that neat to
> > implement as some attributes of this driver don't really pass
> > the channel index to the store()/show() but some other indexes.
> > 
> 
> The channel index is not the only means that can be used to determine
> the channel index. Many drivers use the position in the attrs[] array
> to determine the channel index. I don't see why this would not be
> possible here.

Hmmm, that should simply work...I didn't mean not possible though.

> > If you are very against the dynamical group, I can drop it to
> > leave the sysfs node as it was.
> > 
> > And for the name nodes that I was talking about above, I will
> > add an sysfs store() function so non-DT users can set them,
> > and I also removed the confusing "unknown" default name.
> > 
> 
> The label attributes are RO. Please follow the ABI.
> 
> temp[1-*]_label Suggested temperature channel label.

Thanks a lot for the hint. I looked up the doc and feel that
this one probably fits my situation more:
    in[0-*]_label   Suggested voltage channel label.

Will follow it in my next version.

Thank you
Nicolin